Malicious PDF — malware analysis report

Static analysis result for SHA-256 796d1a7faa315f65…

MALICIOUS

PDF

76.7 KB Created: 2021-09-01 03:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4dba82342dfbbb591af2730016a5e43c SHA-1: 03011a14fa35ad40d347a4fc8cbf55bf71b421bd SHA-256: 796d1a7faa315f654a000add45f4aae023e238485d558272bc837e84f27e9af5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the exploitation of user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://indago-rovigo.it/userfiles/files/vajab.pdf In PDF document text
    • http://interstroy96.ru/uploads/files/39424265920.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/wejivuwonubutekepumit.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/62876217137.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/zogelap.pdfIn PDF document text
    • https://geloracinta.com/contents/files/zirurofumibesusa.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/70005818659.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/faf989a47f0b3d89da0ea30610b324e3/81477745893.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b100c439449e03634f6bdc1bd05656ea/16967929357.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/79459290300.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080e7cc40697---69216587333.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/20864220223.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7fc43c868---danadaziwogipibesosi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f85704dbcf---zagukeg.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3df82c9f58---dojojezulurewezi.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/72920977292.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/29140072297.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f06e60cc1f---bifowogisi.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4aba899749c27e83a76eef455895357a/wilirixowopodatifeguwatik.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/67954147523.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/bufejezel.pdfIn PDF document text
    • http://live-net.it/file/siful.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/rumavoxuvorixinavegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=bgp+private+as+numbersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 18344 bytes
SHA-256: 8a7c1e1ae5d1cddde5bd2532aa67364067c15f3622d98eb19f10b9ea2e6a8999
font_01_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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